COULD USE HELP ON THIS ISSUE

WELL, WILL MAKE THIS SIMPLE AND BRIEF, LATELY, WHEN I TURN ON MY CPU IN THE MORNING, IT WILL START THEN TURN OFF, DO THAT FOR AWHILE THEN IT WILL TURN ON ALL TOGETHER, NEXT CPL DAYS..SEEMS TO WORK FINE..GO ON..EVERYTIME NO PROBLEM, THEN BACK TO SAME ROUTINE, SO I TRIED IT ONE MORNING AND KEPT GOING ON FOR BIT, OFF , THIS TIME WOULDN'T STAY ON..SO I UNPLUGGED PSU AND THEN REPLUGGED AFER SAY 10 SECONDS, WENT RIGHT ON,,THIS WENT THE SAME ROUTINE FOR ABOUT CPL DAYS..GO ON ALL THE TIME..NO PROBLEMS,,THEN STARTED ON-OFF AGAIN..SO TURNED OFF PSU AGAIN THEN TURNED IT BACK ON..CPU STARTED UP FINE..JUST WOULD LIKE TO KNOW IF THIS COULD MEAN MY GPU MIGHT BE GOING OUT..HAD IT FOR 4YRS NOW..ALSO SCREEN GOES DIM ONCE IN AWHILE WHEN THIS SEQUENCE HAPPENS..SHOWS INVISIBLE LINES ACROSS IT..AT TIMES..COULD THIS BE RELATED..ANY HELP WOULD BE APPRECIATED..MY GPU IS:

OCZ GameXStream OCZ700GXSSLI 700W ATX12V SLI Certified CrossFire Ready Active PFC Power Supply :

IF SOMEONE NEEDS MORE SPECS ON HARDWARE WITH THIS CPU..LET ME KNOW..HAVE THEM ALL..THANKS